Power-operated brake



Sept. 22, 192:5.

P. S. MORGAN POWER' OJPFHA'IED` BRAKE Original' Filed Dec. 26, 1919 @Hinwil @7s/Zz; JIVMINVENTOR f4 ATTORNEY patented Sept.. 22, i925'.

resent roeren s. Menden, or NEW YORK, N. Y.

POWEBf-PEMTED BRAKE.

Application :tiled December 26, 1919, Serial No. 347,590. Renewed February 3,1925.

To all whom it may concern:

Be it known that ll, PORTER S. MORGAN, a citizen ot' the United States, and a resident of New York., in the county and State of New* York, have invented certain new .and useful Power-Operated Brakes, of which the -following; is a specilication.

My invention relates to brakes, in which a primary and secondary band are used; the primary band being initially set and by its angular rotation with the drum sets the secondary brake band through means connected therewith.

The objects of my invention are; rst, to provide a brake that is set by power for either direc-tion of rotation of the brake drum; second, to provide a power brake in which the operating force .is proportional to the'speed of the moving drum or vehicle, and third, to provides brake in which the secondary brake band may be set independently or cooperatively with the primary band.

lili

casing, :5 a stationary spider secured to this casing, 6 the brake drum, 7 an internal expanding brake hand having spaced apart ends 8 and 9 with fiat parallel faces, and

10 an external contracting brake bend, both brake bands being held normally out of contact with the brake drum. Between the ends 8 and 9 are placed two cams, one of which 12 is secured t0 a tube 13 journulled in the spider 5, andthe other 11 secured to a shalt 111 journalled in the tube 13. Secured to the shaft ,1li is a lever'l connected,.by the the link 1.6 to the hand lever 17. 'llhis hand lever is adapted to move the link 16 in the direction of the arrow 19 'for rotating the cani and spreading a srt the ends 8 and 9 for setting the secondary brake. The notched quadrant 18 is for holding the hand lever in any posi tion of brakesetting desired. A- vstud 2O is secured in the spider 5 and engages the slot 21 in the. center of the band 7 to hold this band in a central position when clear o' the drum 6. The spring 22 is for heldmg the ends .8 and 9 tightly against the cam 12 and for returning this cam to its normal positon (as shown), when released.

Secured to the tube 13 is a gear quadrant 23 meshing, with a circular rack sector 24 attached to the primary brake band 10 so that ali-angular rotation of the last-mentioned band in either direction will rotate the cam 12 and cause the secondary brake band 7 to rictionally engage the drum 6.

The band 10 has spaced apart ends 25 and 26, connected by a bell-crank lever 27 and adjustable eye rod 28,'or drawing together the ends of the band and setting4 the brake through the link 29 and the foot pedal 30.

The operation ot my brake is as follows; assume the drum to be rotating in the direction of the arrow 32, by pressing the foot pedal the link 29 will be moved in the direction of the arrow 34e and` the primary brake band 10 brought into contact with the rotating drum. As this band is free to rotate, it turns with the drum and, through the intermediary olf the rack 2t and quadrant 23 rotates, the cam 12 and sets the Sec ondary brake. When the foot is removed from the pedal the band, being free to rotate, is turned back to its normal position by the spring- 22, forcing the cam and with it the quadrant 23 back to the central position. if the drum is rotating in the direc tion of the arrow ,33, the primary band 10,

,after being applied, will rotate in this same direction and will turn the cam 12 in a direction opposite to thatA first described, but will still spread the inner brake band and apply the brake.

The hand lever 1'? may be operated to sst .the innerbrake band either simultanerum; a primary. brake 10() ously or independently of the power brake. setting.

with said drum; an operating lever therefor connected directly with said means; means whereby rotary motion of said primary band imparted by said engagement may eiiect an engaging motion of said secondary band with respect to the drinn, comprising a rack secured to said primary brake band, a rack sector engaging therewith, and a cam operatively connected with said rack sector and interposed 'between the spaced ends of the secondary brake band, said sector being the only actuating means for said cam. A

2. 1n a brake, in combination, a brake drum; primary and secondary brake bands engaging said drum; means connected with the primary brake band only to cause it to engage the drum; and means for actuating the secondary brake band to cause it to cngage the drum, said latter means comprising a rack secured to the primary brake band, a rack sector engaging therewith and a cam operatively connected to said sector and cooperating with the secondary brake band to actugite it.

3;"'123 a brake, in combination, a brake drum; primary and secondary brake bands engaging said drum, means connected with the primary brake band only to cause it to thedrnm; and means for actuating the secondary brake band to canse it to enthe drum, saidlatter means comprising a rack secured to the primary brake band, a rack sector engiiging therewith and a cam operatively connected to said sector and cooperating with the secondary brake band to actnatc it; together with means for actuating the secondary brake band independently of the primary brake band.

a. in a brake, in combination, a brake drum; primary and secondary brake bands engaging said drum; means connected with the primary brake band only to cause it t0 engage the drum; and means for actuating the secondary brake band to cause it to cngage the drum, said latter means comprising a rack secured to the primary brake band, a rack sector engaging therewith and a cam operatively connected to said sector and co# operating with the secondary brake band to acttiate it; together with independent means for actuating the secondary brake band comprising a cam coaxial with the first mentioncdvcam.` f

5. A' brake of the character described comprising a brake drum g -a primary brake bandand a secondary brake band engaging said brake drum; means to operate the primary brake band onl lto cause it to engage the' remate means for actuating the secondary brake band comprising a cam coaxial withthelrst mentioned cam.

6. The combination with a brake drum, Y

- ends of said primarybrake band to effect its engagement with said drum, and means independentof the first mentioned means operatively connecting said brake bands and comprising a cam .interposed .between the ends of said secondary brake band, a vrack sector secured to said primary brake band and a gear segment attached to said cam andvmeshing with said rack rector, whereby an angular rotation of said primary brake band actuates said cam to set said secondary brake band. 'i

7. In a power operated brake, in combination, a brake drum; a primary brake band; a secondary brake band having spaced ends; means to efect the engagement of said primary brake band with the brake drum whereby rotary motion of the drum will be imparted to said primary brake band; and means whereby said rotary motion may effect an initial engaging motion of said secondary band with respect to the drum, comprising a rack secured to said primary brake band, a

rack sector engaging therewith, and a cam t operatively connected to said rack sector and I interposed between the spaced ends of the j.'

secondary brake band. A

8. In a power operated brake, in combination, a brake drum; a primary brake band; a secondary brake band having spaced ends; means to effect the engagement of said primary brake band with the brake drum where-- by rotary motioniof the drum will be imparted to said primary brake band; means whereby said rotary motion may effect an initial engaging motion of said secondary vband with respect to the drum comprising a rack secured to said primary brake band, a, rack sector engaging therewith, and a camoperatively connected tosaid rack sector and interposed between the spaced ends'ofthe' secondary brake band; and separate means for actuating said secondary band for engagement with said drum.

9. 1n a power operated brake, in combina tion a brake drum; aprimary' brake band; a

secondary brake band having spaced ends; means to effect the engagement of said primary brake band with the bra-ke drum whereby rotary motion of the drum will be im parted. to said primary brake band; meansy whereby said rotary motion may effect van initial engaging motion of said secondary band with respect to the drum, comprising a rack secured to said primary brake band, a rack sector engaging therewith, a pair of cams interposed between the spaced ends of the secondary brake band, connections between one of the said cams and said rack Sector whereby motion of the primary brake band will be .transmitted, to the secondary j brake band; and means for moving said sec# ondcam independently of the first to actuate saidseeondary band.

10'. A brake of the character described comprisingV u brake drum; a primary brake i l0 band and a. secondary brake band engaging seid brake'druln'; means to operate the pri` mary brake band only to cause itto engage the brake drum with a part Wrap and a part unwrap action; and means controlled en tirely by the primary brake band for actuetl5 ing the secondary brake band with a part wrap and a part unwrap action. f

Signed at New York in the county of New York and State of New York this 16th day of Dec. A. D. 1919.

PoRTER s. MoRGAN. i 4 

